diff --git a/docs/es6/index.md b/docs/es6/index.md
index 81991853..699f7b68 100644
--- a/docs/es6/index.md
+++ b/docs/es6/index.md
@@ -285,7 +285,6 @@ Object.defineProperty(obj, 'a', {
     console.log(`开始读取属性`)
     return 1; 
   },
-  writable : true
 })
 
 obj.a = 2 // 开始设置新值: 2
@@ -464,4 +463,4 @@ methodsToPatch.forEach(function (method) {
 - [https://zh.wikipedia.org/wiki/](https://zh.wikipedia.org/wiki/)
 - [https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Proxy](https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Proxy)
 - [https://es6.ruanyifeng.com/#docs/proxy#Proxy-revocable](https://es6.ruanyifeng.com/#docs/proxy#Proxy-revocable) 
-- [https://youngzhang08.github.io/](https://youngzhang08.github.io/)
\ No newline at end of file
+- [https://youngzhang08.github.io/](https://youngzhang08.github.io/)